Ecosystem Modelling with EwE - Paperbackby Villy Christensen (Author), Carl J. Walters (Author) This textbook provides a basis for courses in ecosystem modelling based on the Ecopath with Ecosim (EwE) modelling framework and software. EwE is a versatile approach with a low but very long (and gradually steeper) learning curve. The authors have been central to the development of EwE for more than thirty years, and during that time the simple Ecopath mass balance approach it started with has